...the shape of the lens and the diameter of the pupil. In addition, between the midbrain reticular formation (known here as the tegmentum) and the crus cerebri is a large pigmented nucleus called the substantia nigra. The substantia nigra consists of two parts, the pars reticulata and the pars compacta.
Vesuvius is the only volcano in the European mainland to have erupted within the last hundred years. Mount Vesuvius was known for its eruption in AD 79 and was named after the biologist Pliny.Since then, this volcano has erupted more than 50 times. Scientists have studied that this volcano is dormant.esuvius is the only volcano in the European mainland to have erupted within the last hundred years. Mount Vesuvius was known for its eruption in AD 79 and was named after the biologist Pliny.
Mount Etna's Plate Tectonics. There are many theories as to why Mount Etna is so active. Mount Etna, like other Mediterranean volcanoes such as Stromboli and Vesuvius, rests on the subduction boundary where the African tectonic plate is being pushed under the Eurasian plate.Although they appear to be geographically close, Etna is actually quite different from the other volcanoes.ava from the other volcanoes is the type produced by the melting of existing crust rather than the upwelling of the mantle layer. There are other possible explanations for the unusual activity of Etna, such as existence of a hotspot or a window-like crack in the African plate.